Here is the translation:

An otoscope is an ear examination tool that contains a light source and a lens system, and it is just one of the tools used for this purpose. Otoscopes are portable, easy to maintain, provide clear images with magnification and self-illumination capabilities, and are easy-to-use examination instruments. The otoscope device is a handheld device used to detect anomalies and possible diseases in the ear by utilizing a light source and a special magnification lens.

It is used for pneumatic otoscopy with a sealed system and for the accurate diagnosis of otitis media. The rotating wide-angle imaging lens provides instrumentation under magnification.

An ophthalmoscope is a device that allows doctors to examine and diagnose the interior of the eye. The ophthalmoscope device uses a magnification lens (ophthalmoscope) composed of a light source powered by a battery, mirrors, and lens arrangement to examine the back part of the eye (fundus) at specific magnifications (such as 15x). This device is commonly referred to as an indirect ophthalmoscope.

The otoscope device provides clear and bright examination space for the doctor by illuminating the ear interior with LED light. Additionally, the image inside the ear is magnified by the lenses in the device, making the inner ear structure easily visible to the doctor. The cold light produced by the LED light source is usually sent to the tip of the otoscope head inside the ear via a fiber-optic transmission channel. The image obtained from the illuminated ear canal is then magnified with the magnification lens at the back of the otoscope head, enabling the doctor to examine the image in detail.